A furnace door assembly for a box-type quenching furnace

Abstract

The utility model provides a furnace door assembly of a box-type quenching furnace, comprising a furnace body, a furnace door and a lifting bracket, wherein the furnace door is arranged at one end of a furnace mouth of the furnace body through the lifting bracket, and the inner walls around the furnace mouth are all arranged with inclined surfaces to form a sealing portion; a surface of one end of the furnace door close to the furnace mouth is provided with a receiving groove, and a sealing plate adapted to the size and shape of the receiving groove is horizontally movably arranged in the receiving groove, and the edges around one side of the sealing plate are arranged with inclined surfaces and adapted to the size and shape of the sealing portion, a threaded sleeve is fixedly arranged at the center of the other side of the sealing plate, a through hole is penetrated through the center of the inner wall of the receiving groove, a threaded rod is rotatably arranged in the through hole, one end of the threaded rod is embedded in the threaded sleeve and threadedly connected with the threaded sleeve, and the other end of the threaded rod is driven to rotate by a rotating motor in cooperation with a transmission component, so that the sealing plate is displaced under the action of the thread, and the sealing plate is horizontally embedded in the furnace mouth and fits with the sealing portion to realize pressure sealing, thereby effectively ensuring the sealing of the furnace mouth.

Description

Technical Field

[0001] The utility model belongs to the technical field of quenching equipment, and in particular relates to a furnace door component of a box-type quenching furnace. Background Art

[0002] The quenching furnace is mainly used for quenching and heat treatment of workpieces, etc. Quenching refers to a metal heat treatment process in which a metal workpiece is heated to a certain appropriate temperature and maintained for a period of time, and then immersed in a quenching medium for rapid cooling. At present, the furnace doors of large quenching furnaces are mostly closed by vertical lifting and lowering, and the furnace door and the furnace mouth are kept in close contact to ensure the sealing effect and avoid heat loss. However, during the lifting process of the furnace door, the furnace door will rub against the furnace mouth. After long-term wear, a gap will appear between the furnace mouth and the furnace door due to friction, thereby affecting the sealing of the furnace door. Chinese patent document: CN202020632482.3, discloses a furnace door device for a box-type quenching furnace. The furnace door bracket in the application adopts a guide rail with a bent portion at the lower end, so that when the furnace door roller slides on the guide rail, it is tilted and displaced downward in the direction of the furnace mouth under the action of the bent portion, so that the raised sealing end on the furnace door is engaged with the sealing portion on the furnace mouth to achieve the inclined surface sealing effect. This method of tilting the furnace door downward will result in errors in actual use, causing a gap between the sealing end and the sealing part, ultimately affecting the sealing effect of the furnace door. Utility Model Content

[0003] In view of the above problems, the utility model discloses a furnace door assembly of a box-type quenching furnace, which solves the problem in the prior art that a gap is easily formed between the furnace door assembly and the furnace mouth after long-term use, thereby affecting the sealing of the furnace body.

[0004] The specific technical solutions are as follows:

[0005] A furnace door assembly of a box-type quenching furnace comprises a furnace body, a furnace door and a lifting bracket, wherein the furnace door is arranged at one end of a furnace mouth of the furnace body through the lifting bracket, and the inner walls around the furnace mouth of the furnace body are all arranged with inclined surfaces and form a sealing portion; the furnace door is longitudinally slidably connected by rollers on both sides of the furnace door in cooperation with the guide rails on both sides of the lifting bracket, and the furnace door is driven to rise and fall by a driving motor and a sprocket assembly on the lifting bracket; a receiving groove is provided on the surface of one end of the furnace door close to the furnace mouth, and a sealing plate with a size and shape adapted to the size and shape of the sealing plate is horizontally movably arranged in the receiving groove, the edges around one side of the sealing plate are arranged with inclined surfaces and adapted to the size and shape of the sealing portion, a threaded sleeve is fixedly arranged at the center of the other side of the sealing plate, a through hole is penetrated through the center of the inner wall of the receiving groove, a threaded rod is horizontally rotated in the through hole, one end of the threaded rod is embedded in the threaded sleeve and threadedly connected thereto, and the other end of the threaded rod is driven to rotate by a rotating motor arranged on the furnace door in cooperation with a transmission assembly, so that the sealing plate is displaced under the action of the thread, and the sealing plate is horizontally embedded in the furnace mouth and fits with the sealing portion to achieve sealing.

[0006] Furthermore, guide shafts are horizontally arranged around one side of the sealing plate, and sliding grooves for accommodating four guide shafts are respectively opened around the inner wall of one end of the accommodating groove, so that the accommodating groove guides the translation of the sealing plate.

[0007] Furthermore, a limit seat is provided at one end of the opening of the inner side wall around the accommodating groove, and a limit plate cooperating with the limit seat is provided around the sealing plate to achieve the limitation of the translation of the sealing plate by the accommodating groove.

[0008] Furthermore, a sealing member is provided on the inner side wall of the limiting seat, and the sealing member realizes sealing under the pressing action of the limiting plate.

[0009] Furthermore, the transmission assembly includes a driving wheel, a driven wheel and a transmission chain, the driven wheel is arranged on the threaded rod, the driving wheel is arranged on the output shaft of the rotating motor, and the driving wheel and the driven wheel are connected through the transmission chain.

[0010] Furthermore, a sealing bearing is provided in the through hole, and the sealing bearing is sleeved on the threaded rod to realize the rotational connection between the threaded rod and the through hole, and annular heat-insulating sealing parts are also provided on both sides of the sealing bearing in the through hole.

[0011] The beneficial effects of the utility model are embodied in:

[0012] The utility model provides a retractable sealing plate on the furnace door, which can be extended into the furnace mouth under the drive of the rotating motor and the transmission assembly, and cooperates with the sealing part of the furnace mouth through the inclined surface of the side edge to achieve pressure sealing, thereby effectively ensuring the sealing of the furnace mouth and improving the quenching quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the furnace door assembly before it descends in the utility model.

[0014] Figure 2 It is a schematic diagram of the structure of the furnace door assembly after it is lowered in the utility model.

[0015] Figure 3 It is the front view of the utility model.

[0016] Figure 4 It is a schematic diagram of the structure between the threaded sleeve and the threaded rod in the utility model.

[0017] Figure 5 It is a schematic diagram of the structure between the sealing plate and the furnace mouth in the utility model.

[0018] Furnace body 1, sealing part 101, furnace door 2, accommodating groove 21, sliding groove 211, sealing plate 22, guide shaft 221, threaded sleeve 222, limiting plate 223, through hole 23, threaded rod 231, heat insulation sealing part 232, sealing bearing 233, limiting seat 24, sealing part 25, lifting bracket 3, driving motor 31, sprocket assembly 32, guide rail 33, roller 34, driving wheel 35, driven wheel 36, transmission chain 37, rotating motor 38. DETAILED DESCRIPTION

[0019] In order to make the technical solution of the utility model clearer, the utility model is further described below in conjunction with the accompanying drawings. Any equivalent replacement of the technical features of the technical solution of the utility model and any solution derived from conventional reasoning shall fall within the protection scope of the utility model. The fixed connection and fixed setting mentioned in the utility model are all common connection methods in the mechanical field, including welding, bolt and nut connection, and screw connection.

[0020] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0021] like Figure 1-5 As shown, this embodiment provides a furnace door assembly of a box-type quenching furnace, including a furnace body 1, a furnace door 2 and a lifting bracket 3. The furnace door 2 is arranged at one end of the furnace mouth of the furnace body 1 through the lifting bracket 3, and the furnace door 2 is arranged in close contact with one end of the furnace body 1. The inner walls around the furnace mouth of the furnace body 1 are all arranged with inclined surfaces and form a sealing portion 101. The two sides of the furnace door 2 are matched with the guide rails 33 on both sides of the lifting bracket 3 through rollers 34 to achieve longitudinal sliding connection. The lifting bracket 3 drives the furnace door 2 to rise and fall through the driving motor 31 and the sprocket assembly 32. The sprocket assembly 32 is a prior art and will not be described in detail here.

[0022] A receiving groove 21 is provided on the surface of one end of the furnace door 2 near the furnace mouth, and a sealing plate 22 with a size and shape adapted to the receiving groove 21 is horizontally movably arranged in the receiving groove 21. The edges around one side of the sealing plate 22 are arranged as inclined surfaces and are adapted to the size and shape of the sealing portion 101. Guide shafts 221 are horizontally arranged around the other side of the sealing plate 22, and sliding grooves 211 for accommodating four guide shafts 221 are respectively provided around the inner wall of one end of the receiving groove 21, so that the receiving groove 21 guides the translation of the sealing plate 22, and the sealing plate A threaded sleeve 222 is fixedly provided at the center of the other side of 22, and a through hole 23 is penetrated at the center of the inner wall of the accommodating groove 21, and a threaded rod 231 is horizontally rotatably provided in the through hole 23, one end of the threaded rod 231 is embedded in the threaded sleeve 222 and threadedly connected thereto, and the other end of the threaded rod 231 is driven to rotate by a rotating motor 38 provided on the furnace door 2 in cooperation with a transmission assembly, so that the sealing plate 22 is displaced under the action of the thread, and the sealing plate 22 is horizontally embedded in the furnace mouth and fits with the sealing part 101 to achieve sealing.

[0023] A limit seat 24 is provided at one end of the opening of the inner side wall around the accommodating groove 21, and a limit plate 223 cooperating with the limit seat 24 is provided around the sealing plate 22 to limit the translation of the sealing plate 22 by the accommodating groove 21. A heat insulating seal 25 is provided on the inner side wall of the limit seat 24, and the heat insulating seal 25 is sealed under the pressure of the limit plate 223, further improving the sealing effect and preventing heat loss.

[0024] In this embodiment, the transmission assembly includes a driving wheel 35, a driven wheel 36 and a transmission chain 37. The driven wheel 36 is arranged on the threaded rod 231, and the driving wheel 35 is arranged on the output shaft of the rotating motor 38. The driving wheel 35 and the driven wheel 36 are connected by the transmission chain 37, so that the rotating motor 38 drives the threaded rod 231 to rotate, and the threaded rod 231 and the threaded sleeve 222 drive the sealing plate 22 to translate through the threaded sleeve 222 under the action of the thread.

[0025] In this embodiment, a sealing bearing 233 is provided in the through hole 23, and the sealing bearing 233 is mounted on the threaded rod 231 to realize the rotational connection between the threaded rod 231 and the through hole 23. In addition, an annular heat-insulating sealing member 232 is provided on both sides of the sealing bearing 233 in the through hole 23 to achieve a heat-insulating effect.

[0026] The working principle of the utility model is as follows: when closing the furnace door 2, the driving motor 31 on the lifting bracket 3 drives the sprocket assembly 32 to drive the furnace door 2 to descend. At this time, the furnace door 2 and the furnace mouth remain in a fitted state. After the furnace door 2 is lowered into place, the rotating motor 38 is started and drives the threaded rod 231 to rotate through the transmission assembly, so that the threaded sleeve 222 pushes the sealing plate 22 to move forward under the action of the thread until the inclined surface of the sealing plate 22 is completely pressed and fitted with the furnace mouth sealing part 101. At the same time, the limiting plates 223 around the sealing plate 22 are pressed against the heat insulating seal 25 of the limiting seat, starting a further sealing effect.

[0027] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a technician familiar with the technical field within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A furnace door assembly of a box-type quenching furnace, comprising a furnace body (1), a furnace door (2) and a lifting bracket (3), wherein the furnace door (2) is arranged at one end of a furnace opening of the furnace body (1) through the lifting bracket (3), and the inner walls around the furnace opening of the furnace body (1) are all arranged with inclined surfaces and form a sealing portion (101); the two sides of the furnace door (2) are matched with the guide rails (33) on the two sides of the lifting bracket (3) through rollers (34) to achieve longitudinal sliding connection, and the lifting bracket (3) drives the furnace door (2) to rise and fall through a driving motor (31) and a sprocket assembly (32); characterized in that A receiving groove (21) is provided on the surface of one end of the furnace door (2) close to the furnace opening, and a sealing plate (22) whose size and shape match the receiving groove (21) is horizontally movably arranged in the receiving groove (21), and the edges around one side of the sealing plate (22) are arranged as inclined surfaces and match the size and shape of the sealing portion (101), and a threaded sleeve (222) is fixedly arranged at the center of the other side of the sealing plate (22), and a through hole (23) is penetrated through the center of the inner wall of the receiving groove (21), and a threaded rod (231) is horizontally rotatably arranged in the through hole (23), one end of the threaded rod (231) is embedded in the threaded sleeve (222) and is threadedly connected thereto, and the other end of the threaded rod (231) is driven to rotate by a rotating motor (38) provided on the furnace door (2) in cooperation with a transmission assembly, so that the sealing plate (22) is displaced under the action of the thread, and the sealing plate (22) is horizontally embedded in the furnace opening and fits with the sealing portion (101) to achieve sealing.

2. A door assembly of a box-type quenching furnace as claimed in claim 1, characterized in that: Guide shafts (221) are horizontally arranged around one side of the sealing plate (22), and sliding grooves (211) for accommodating four guide shafts (221) are respectively opened around the inner wall of one end of the accommodating groove (21), so as to guide the translation of the sealing plate (22) by the accommodating groove (21).

3. A furnace door assembly for a box-type quenching furnace as claimed in claim 1, characterized in that: A limiting seat (24) is provided at one end of the opening of the inner side wall around the accommodating groove (21), and a limiting plate (223) matching the limiting seat (24) is provided around the sealing plate (22), so as to limit the translation of the sealing plate (22) by the accommodating groove (21).

4. A furnace door assembly for a box-type quenching furnace as claimed in claim 3, characterized in that: The inner side wall of the limiting seat (24) is provided with a sealing member (25), and the sealing member (25) realizes sealing under the pressing action of the limiting plate (223).

5. The furnace door assembly of a box-type quenching furnace according to claim 1, characterized in that: The transmission assembly comprises a driving wheel (35), a driven wheel (36) and a transmission chain (37); the driven wheel (36) is arranged on a threaded rod (231); the driving wheel (35) is arranged on an output shaft of a rotating motor (38); and the driving wheel (35) and the driven wheel (36) are connected in transmission via the transmission chain (37).

6. A furnace door assembly for a box-type quenching furnace as claimed in claim 1, characterized in that: A sealing bearing (233) is provided in the through hole (23), and the sealing bearing (233) is sleeved on the threaded rod (231) to realize the rotational connection between the threaded rod (231) and the through hole (23), and an annular heat-insulating sealing member (232) is also provided on both sides of the sealing bearing (233) in the through hole (23).

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